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Property, Plant and Equipment (Details Textual) (USD $)	12 Months Ended
Property, Plant and Equipment (Details Textual) (USD $)	Jan. 31, 2013	Jan. 31, 2012
Depreciation	$ 451,000	$ 380,000

The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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